<template>
    <div class="shopcar-container">
        <div class="goods-list">

            <!-- 商品列表区域 -->
            <div class="mui-card" v-for="(item ,i) in goodslist" :key="item.id">
                <div class="mui-card-content">
                    <div class="mui-card-content-inner">
                        
                        <mt-switch 
                        v-model="$store.getters.getGoodsSelected[item.id]"
                        @change="selectedChanged(item.id,$store.getters.getGoodsSelected[item.id])">
                        </mt-switch>
                        <img :src="item.thumb_path" alt="">
                        <div class="info">
                            <h1>{{ item.title }}</h1>
                            <p>
                                <span class="price">¥{{ item.sell_price }}</span>
                                <numbox :initcount="$store.getters.getGoodsCount[item.id]" :goodsid="item.id"></numbox>
                                <!-- 问题：如何从购物车中获取商品的数量呢 -->
                                <!-- 1. 我们可以先创建一个空对象，然后循环购物车所有商品的数据，把当前循环这条山沟的id，作为对象的属性名,count值作为对象的属性值，这样，当把所有的商品循环一遍，就会得到一个对象 {88:2, 99:1, 90:4}  -->
                                <a href="#" @click.prevent="remove(item.id,i)">删除 </a>
                            </p>
                        </div>
                    </div>
                </div>
            </div>

            <!-- 结算区域 -->
            <div class="mui-card">
                <div class="mui-card-content">
                    <div class="mui-card-content-inner jiesuan" >
                        <div class="left">
                            <p>总计（不含运费）</p>
                            <p>已勾选商品 <span class="red">{{ $store.getters.getGoodsCountAmount.count }}</span> 件，总价：¥ <span class="red">{{ $store.getters.getGoodsCountAmount.amount }}</span></p>  
                        </div>
                        <mt-button type="danger" >去结算</mt-button>
                    </div>
                </div>
            </div>
        </div>

        <p>{{ $store.getters.getGoodsSelected }}</p>
    </div>
</template>

<script>
import numbox from '../subcomponents/shopcar_numbox.vue';

export default {
    data() {
        return {
            goodslist : []  //购物车中所有商品的数据
        }
    },
    created() {
        this.getGoodsList();
    },
    methods :{
        getGoodsList() {
            //1. 获取到 store 中所有的商品的id，然后拼接出一个 用逗号分割的字符串
            var idArr = [];
            this.$store.state.car.forEach(item => idArr.push(item.id));
            //如果，购物车中没有商品，则直接返回，不需要请求数据接口，否则会报错
            if(idArr.length <= 0) {
                return;
            }
            //获取购物车商品列表
            this.$http.get("api/goods/getshopcarlist/" + idArr.join(",")).then(result => {
                if(result.body.status === 0){
                    this.goodslist = result.body.message;
                }
            })
        },
        remove(id, index){
            //点击删除，把商品从store中根据传递的id删除，同时，把当前组件中的goodslist中，对应要删除的那个商品，使用index来删除
            this.goodslist.splice(index, 1);
            this.$store.commit('removeFormCar',id);
        },
        selectedChanged(id,val) {
            //每当点击开关，把最新的 开关状态 同步到store中
            console.log(id +'---'+ val);
            this.$store.commit('updateGoodsSelected',{id,selected:val});
        }
    },
    components : {
        numbox
    }
}

</script>

<style lang="scss" scoped>
.shopcar-container {
    background-color:#eee;
    overflow : hidden;
    .goods-list{
        .mui-card-content-inner{
            display:flex;
            align-items: center;
        }
        img{
            width: 60px;
            height: 60px;
        }
        h1{
            font-size: 13px;
        }
        .info{
            display:flex;
            flex-direction: column;
            justify-content: space-between;
            .price{
                color:red;
                font-weight: bold;
            }
        }
    }
    .jiesuan {
        display: flex;
        justify-content: space-between;
        align-items: center;
        .red{
            color:red;
            font-size: 16px;
        }
    }
}
</style>